# How to Calculate Current?

Current is calculated as I=Q/t which is charge in coulombs divided by time. The Q= charge units known as Coulombs, t=time units usually in seconds and the unit of current being Amperes.
To calculate current using Ohm's law, you must know the voltage and resistance. Ohm's law is I = V/R, where I is the current, V is voltage and R is resistance.
Calculating current can be a tricky thing if you don't know the formulas. You want to be sure you've got it right, especially if you are hooking something electrical up.
In order to be able to calculate the current in a device, you must use a simple formula. Current is the same as amps (amperage) and can be figured by dividing the amount of wattage of the device by the voltage of the device. I (current or amps) = W (Watts) / V (Volts). You can find more information at www.csgnetwork.com
To calculate the current or amperes, take the watts and divide it by the voltage. You can also calculate it by dividing the watts by the resistance and taking the square root of that number.
In order to calculate current you will need voltage, Ohms and or watts. Two of these components are needed in a formula. One way is to divide your voltage by Ohms. Another is to divide watts by your voltage.
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 1. Determine the voltage and resistance of the circuit. Calculation of current is basic electronics theory. These two variables must be determined before current can be calculated http://www.ehow.com/how_5172043_calculate-dc-curre...
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